Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b7f6f87f75edcb…

MALICIOUS

PDF

71.9 KB Created: 2021-02-18 06:24:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d5900cb77aff29c6765f7ffdecba72f9 SHA-1: 0c718afee11b957421a72c35338c995c94c50864 SHA-256: c0b7f6f87f75edcb43a8a78dbda7ae94ddc2c8b4db4296745f9dfafa482458b2
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/wix?keyword=attack+of+the+radioactive+thing+chemical+boards In PDF document text
    • https://cdn.sqhk.co/tifesijoja/bNwx2ih/megepuwusuluwofofumonoku.pdfIn PDF document text
    • https://kiwakamumosa.weebly.com/uploads/1/3/5/9/135963193/6547633.pdfIn PDF document text
    • http://wigoduxaru.22web.org/xiwovuzozo.pdfIn PDF document text
    • https://cdn.sqhk.co/movijomo/ijlGXsE/super_mario_cat_bros_game.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/jcujchj/the_walking_dead_season_one_apk_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/jesjjRY/5869601056.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/PijJQtu/weather_underground_radar.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/sibje76/company_of_heroes_2_ardennes_assault_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/ieYhdM8/amazon_seller_central_customer_service_number.pdfIn PDF document text
    • https://cdn.sqhk.co/vasinabew/idmLlhf/5445652815.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://walexesanub.rf.gd/28173526941.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/can_you_solve_this_flowers_answer.pdfIn PDF document text
    • http://gewagopixinilu.rf.gd/wepogamafinuzomapazisef.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/justin_bieber_songs_offline.pdfIn PDF document text
    • http://wozadubokurego.epizy.com/chrome_software_reporter_tool.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9D 5688 bytes
SHA-256: dd5342d262fc56972c7366f132ca3d9206fcd8f4b435997d6d32f5201e00a57f
font_01_sfnt_off0000f0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DA 9888 bytes
SHA-256: 08d9f444722adab39ffa897c50f64f794d3f561639d000bfb8432939889338cf

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